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<div class="text100"><div class="inner">..\st7\lib\sources\core\ldr.S</div><div class="outer"><big>sys.lib</big></div></div>
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<div class="text100"><div class="inner"><b>LDchk</b></div><div class="outer">Function</div></div><div class="crlf0"></div>
<div class="text100"><div class="inner">rc = LDchk();</div><div class="outer">Call</div></div><div class="crlf0"></div>
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<div class="inners">-</div>
<div class="inners">-</div>
<div class="innerl">nothing</div>
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<div class="inners">DD</div>
<div class="inners">rc</div>
<div class="innerl">always zero</div>
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LDchk() periodically queries the time stamp of all allocated memory blocks. If the time stamp of a memory block
 expired, it is freed automatically. The timer interval is defined in the global variable CHK_DELAY (OS/2 HMSh
 format), the maximum time of inactivity is defined in the global variable CHK_REMOVE (OS/2 HMSh format).
 LDchk() subtracts the time stamp of each block from the current time and calls LDfre(), if the difference is a
 negative number. To prevent memory blocks from being removed by LDchk(), you should set the LDR_STATIC flag
 before you call LDreq(). Data fields and fields allocated with the LDR_AUTOSAVE option are stored automatically,
 all other memory blocks are removed without saving them.
</div><div class="outer">Description</div></div><div class="crlf0"></div>
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Dynamic memory management is an optional feature. You have to set CHK_DELAY and CHK_REMOVE to non-zero values,
 create and start a timer and provide a WM_TIMER procedure calling LDchk() to make use of it. Please read the
 files <i>V700.c</i> und <i>hvar.h</i> found in the <a href="../../../st7/d/v7s.htm">V700 skeleton</a> to get
 an overwiew how to implement the dynamic memory management feature properly.
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